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which is made concentric to the opening a3.

UNITED STATI-:s

PATENT Genion.

JAMES H. BLESSING, OF ALBANY, N-Y YORK. u

- STOP-VALVE.

SPECIFICATION forming pere er Lettere Patent No. 294,357, dated Meren 4,1884.

Application filed May 16, 1883. (No model.)

To @ZZ whom, it may concern,.-

-Be it known that I, JAMES H. BLEssING, of the city and county ofAlbany, in the State of N ew York, have invented certain new and usefulImprovements in Stop-Valves, of which the following is a specification.

My invention relates to improvements in that class of straight-waystop-valves that are provided with valve-seats Xed in an inclinedposition in respect to the line of the ow of liquids through the device;and the object of my improvements is to provide that class of valveswith removable seats which rest upon elastic cushions. This object Iattain by means of the construction illustrated in the accompanyingdrawings, which form part of this specication, and in whichi Figure 1 isa side elevation of my valve; Fig. 2, al longitudinal section of thecasing, valve-seat, and sleeve,the valve and screwstem being shown inelevation; Fig. 3, a transverse section through the casing and sleeve atthe irregular line w on Fig. 2, Fig. 4, a horizontal section at the liney y on Fig. 2, and Fig. 5 al rear elevation of the sleeve for securingthe valve-seat in place.

As shown in the drawings, A is the valvecasing, made in the 'form of avertical cylinder, with an inlet-branch, a, and outlet-branch a', formedat opposite-sides of it, and so as to range in 'line with each other. Atransverse partition, a2, fixed in an inclined position, as shown inFig. 2, is formed in said casing between the branches c and a. containsa circular opening, a, for the passage 'of uids therethrough, and itisprovided on its upper face with an annular tongue, a,

The removable valveseat B is provided with an opening, b, which conformsto the opening a3, and has in its under face an annular groove, whichfits upon the annular tongue a* of the partition c2. An elastic packing,b', is fitted into the said annular groove, to form a tight jointbetween the valve-seat B and annular tongue a* in the manner fullydescribed and shown in Letters Patent of the United States No. 27 2,684, granted to meon the 20th day of February, 1883.

The removable sleeve C is fitted to slide into the cylindrical body ofthe casing A, and has its lower end out to an angle which conforms Said.partition to the angle of the partition ai, so that the said lower endmay obtain a fair bearing upon the upper surface of the valve-seat B forthe purpose of securing the latter to its place. Through its longestside the sleeve C has an opening, c, made to conform to the opening intheoutlet-branch a of the valve-casing, and transversely to the line ofthe opening c, vertical grooves c are formed oppositely, in the innerside ofl said sleeve, for the purpose of guiding the valve D andpreventing said-'valve from being rotated by the action of the'screwstem by which it is operated. The upper end of the sleeve C isfinished `to the same plane of the lupper end of the cylindrical part ofthe valve-casing, and is adapted .to receive a pressure from the bonnetE of said casing.

The valve D has its face arranged at an angle to its line of motion,which angle corresponds to the angle of the valve-seat B; and the saidvalve is provided with wings d, which engage in the guiding-grooves c ofthe sleeve for the purpose above set forth. By means of a screw-cap, d,the valve is connected to the screw-stem F in such manner that, whilethe said'stem has perfect freedom to rotate, it will have full controlof said valve to properly effeet the opening and closing movements ofthe latter. The screw-stem F is provided with a screw-threaded portion,f, which engages in able appliance, is attached to the outer end of thestem F for the purpose of rotating the latter to effect the opening andclosing movements of the valve.

Then the sleeve C is xed in the cylindrical body of the valve-casinginsuch manner that the beveled end of said sleeve will bear fairly uponthe upper face of the valve-seat B. The valve D is fixed upon the stemF, and the latter is inserted to or near its greatest height in thebonnet E. Then the valve B is inserted into the sleeve C, each of theWings d being placed in its appropriate groove e, and the bonnet E isscrewed down, so as to press the sleeve C downward and hold the seat Bseeurely in place. The hand-Wheel G is next secured in place `upon thestem F, and the valve is ready for use.

In case of any slight difference between the angle of the valve andvalve-seat, (which difference, when the parts are properly made, wouldbe inexcusable) the elasticity of the packing b will permit thevalve-seat B to yield and aecommod ate itselll tothe face ot' the valveD when the valvestem F is screwed down hard.

Theinner parts of my valve are so perfectly accessible that any of itscontained parts can be repaired and renewed without removing thevalve-casing from its place in the pipes in which it is used.

I claim as my invention# l. ln a screw-valve, the combination, with avalveeasing and an inclined valve, operated by a vertically-moving stem,of a removable valveseat arranged in an inclined position and supportedby an annular tongue, which 'prevents a lateral movement of said seat,but

permits a slight tilting movement thereof by reason of an elasticpacking between said valve-seat and its support, thereby enabling thevalve-seat to accommodate itself to the i'ace of the valve,substantially as specified.

2. In a screw-valve, the combination, with a valve-easing provided witha valve-seat arranged in an inclined position, as herein described, anda removable sleeve provided with oppositely-arranged vertical guides,and having its lower end made to conform to the angle of the valve-seat,of a valve adapted to be guided in said removable sleeve, and having itsface on an inclined plane that conforms to the angle of the valve-seat,the line of ntion ot' said valve being constantly in a verticaldirection. but inclined in respect to the plane of the valvcseat,substantially as herein specified.

8. In a screw-valve, the combination, lwith a valve easing, A,containing a transverse partition, a?, arranged in an inclined position,as herein described, a valve-seat, B, removably attached to the inclinedpartition a, and a removable sleeve, C, provided with guidinggrooves c,and adapted to secure the Yalveseat B in place, as herein set forth, ofthe valve l), having its face set to coliform to the angle of thevalveseat B, and having Wings d, that are adapted to engage in theguidinggrooves c, as and for the purpose herein speer fied.

JAMES lll. BLESSING.

Vitnesses:

tl/"lutin l Low, S. B. lnmvrna.

